Did some memory optimisation, moved some files and created a completely not tested gui class that will list an artist's tracks.

Made tracks return an already existing object when they get created with a path of an already existing track object.

wobuzz/ui/library/__init__.py

@@ -0,0 +1 @@
+#!/usr/bin/python3

wobuzz/ui/library/artist_view.py

@@ -0,0 +1,42 @@
+#!/usr/bin/python3
+
+from PyQt6.QtWidgets import QTreeWidget, QAbstractItemView
+
+from ..playlist_view import PlaylistView
+
+
+class ArtistView(PlaylistView):
+    def __init__(self, playlist, library_widget, parent=None):
+        QTreeWidget.__init__(self, parent)
+
+        self.playlist = playlist
+        self.library_widget = library_widget
+
+        self.app = playlist.app
+
+        self.header = self.header()
+        self.header.setSectionsClickable(True)
+        self.header.setSortIndicatorShown(True)
+
+        playlist.views[id(self.library_widget)] = self  # let the playlist know that this view exists
+
+        self.setSelectionMode(QAbstractItemView.SelectionMode.ExtendedSelection)
+
+        self.setColumnCount(3)
+
+        headers = [
+            "#",
+            "Title",
+            "Artist",
+            "Album",
+        ]
+
+        self.setHeaderLabels(headers)
+
+        self.itemActivated.connect(self.on_track_activation)
+        self.header.sectionClicked.connect(self.on_header_click)
+        self.sort_signal.connect(self.sortItems)
+
+    def setDragDropMode(self, behavior):
+        pass  # user should not be able to sort the playlist manually
+

wobuzz/ui/library/library.py

@@ -0,0 +1,35 @@
+#!/usr/bin/python3
+
+from PyQt6.QtGui import QIcon
+from PyQt6.QtWidgets import QToolBox, QLabel, QToolButton
+from wobuzz.ui.playlist_tabs import PlaylistTabs
+
+
+class LibraryWidget(QToolBox):
+    def __init__(self, library, parent=None):
+        super().__init__(parent)
+
+        self.library = library
+
+        self.playlist_tabs = PlaylistTabs(library)
+
+        self.addItem(self.playlist_tabs, "Playlists")
+
+        self.create_playlist = QToolButton(self)
+
+        plus_icon = QIcon.fromTheme(QIcon.ThemeIcon.ListAdd)
+        self.create_playlist.setIcon(plus_icon)
+
+        self.playlist_tabs.setCornerWidget(self.create_playlist)
+
+        label = QLabel()
+        self.addItem(label, "Genres")
+        label = QLabel()
+        self.addItem(label, "Albums")
+        label = QLabel()
+        self.addItem(label, "Artists")
+        label = QLabel()
+        self.addItem(label, "Tracks")
+
+        self.create_playlist.pressed.connect(self.library.new_playlist)
+

wobuzz/ui/library/library_dock.py

@@ -0,0 +1,17 @@
+#!/usr/bin/python3
+
+from PyQt6.QtWidgets import QDockWidget
+from wobuzz.ui.library import LibraryWidget
+
+
+class LibraryDock(QDockWidget):
+    def __init__(self, library, parent=None):
+        super().__init__(parent)
+
+        self.library = library
+
+        self.setAcceptDrops(True)
+
+        self.library_widget = Library(library, self)
+        self.setWidget(self.library_widget)
+